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XIII. Service and Maintenance
Refer to Section VII "Venting" to re-assemble any vent system components that are disassembled during this
inspection and for details on supporting, pitching, and terminating the vent system.
s. Replace any wiring which has been disconnected.
t.
Inspect the hydronic system. Look for leaks and repair any found. If system contains antifreeze, or
other additives, test and/or maintain them as directed by the additive manufacturer. Refer to Section
XI. "Start-up and Checkout" for important information on boiler water and the use of boiler water
additives.
NOTICE Do not remove return pipe connection from heat exchanger to service the circulator.
u. Test the flow switch. To do this:
•
Start with the boiler in standby.
•
Either close a shut-off in the boiler loop or unplug the boiler pump at connector L1. (see Figure
10.8)
•
Initiate a call for heat and confirm that the boiler shows an Active Fault indicating that the flow
switch is open.
CAUTION
If burner comes on with no flow through the boiler, there is a problem with the flow
switch. Turn the boiler off immediately. Failure to do so could cause severe heat exchanger damage.
v.
Follow ALL instructions in Section XI "Start-up and Checkout" to place the boiler back in service,
including the performance of a combustion test.
107672-03 - 5/18
(continued)
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